Patrick McGoohan
Filmography

Year
Title
Role
Notes
1955
The Vise
Tony Mason
1 episode ("Gift from Heaven")
1958
The Vise
Vance
1 episode ("Blood in the Sky")
1958
Armchair Theatre
Jack 'Pal' Smurch
1 episode ("The Greatest Man in the World")
1959
Brand
Priest Brand
Henrik Ibsen play
1961
Armchair Theatre
Nicholai Soloviov
1 episode ("The Man Out There")
1960–62 1964–67
Danger Man
John Drake
39 + 47 episodes. Also directed three episodes.
1963
Walt Disney's Wonderful World of Color
Doctor Christopher Syn/ Scarecrow of Romney Marsh
3 episodes
1967–68
The Prisoner
Number Six
17 episodes. Also directed five episodes.
1969
Journey into Darkness
Host
Made-for-TV film
1974
Columbo
Colonel Lyle C. Rumford
1 episode ("By Dawn's Early Light")
1975
Columbo
Nelson Brenner
1 episode ("Identity Crisis"). Also directed.
1976
Columbo
N/A
1 episode ("Last Salute to the Commodore") – director
1977
Rafferty
Doctor Sid Rafferty
13 episodes. Also directed one episode.
1979
The Hard Way
John Connor
Made-for-TV film
1983
Jamaica Inn
Joss Merlyn
-
1985
American Playhouse
Chief magistrate
3 episodes ("Three Sovereigns for Sarah" parts I, II & III)
1987
Murder, She Wrote
Oliver Quayle
1 episode ("Witness for the Defense")
1990
Columbo
Oscar Finch
1 episode ("Agenda for Murder"). Also directed.
1998
Columbo
Eric Prince
"Ashes to Ashes". Also directed.
2000
Columbo
N/A
1 episode ("Murder with Too Many Notes") – director
2000
The Simpsons
Number Six
1 episode ("The Computer Wore Menace Shoes")

Question: When did Patrick McGoohan reprise his role as Number Six?
Answer: In 2000, Patrick McGoohan reprised his role as Number Six in The Simpsons episode, "The Computer Wore Menace Shoes".